Will your first grader help Tommy the Toucan solve this KenKen® puzzle? He'll need his addition and subtraction facts and the numbers 1 through 4.

KenKen® was invented by a Math teacher in Japan in order to make learning more fun! It is a puzzle that combines the use of simple math operations with problem solving skills. Your first grader will love using his critical thinking skills to figure out where each number belongs in this KenKen®! Here's how:

Using the digits 1-4 in this 4x4 puzzle, fill the small squares with digits so as not to repeat a digit in any row or column, and so that the digits within each heavily outlined area will equal that area’s corner number when combined using the given operation. For more information visit www.kenken.com.

“KenKen® is a registered trademark of Nextoy, LLC, ©2009, KenKen Puzzle LLC”.  All rights reserved.